TY  - GEN
AU  - Copi, Irving M.
AU  - Cohen, Carl.
TI  - Introduction to logic
SN  - 0029461928
AV  - BC108 .C66 1990
PY  - 1990///
CY  - New york
PB  - Macmillan Publishing
KW  - Logic
N1  - Includes bibliographical references and index
ER  -